JP2001288962A - Automatic opening-closing device for fittings - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an automatic opening-closing device for fittings which can be installed in a groove of a lintel and which is small in size and excellent in the properties of construction and maintenance. SOLUTION: Main components such as a movable element unit 11 and a fixed element 21 are incorporated in a rail member 1 and integrated. Therefore furnishing and removal for maintenance can be executed simply from below the lintel 51 and work for adjustment at the site is dispensed with. A fitting 41 needs only to be put to a hanger 31 and, therefore, it can be simply furnished and removed. The fixed element and the hanger with a roller may be connected together by holding a projecting thread part formed on the lower side of the fixed element from both the right and left sides by the hanger with the roller put to the fitting, or by engaging the hanger with an engaging part provided in the fixed element from the opposite ends of the fixed element. Thereby the fixed element and the hanger can be connected and disconnected simply and thus the property of maintenance is improved.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for automatically opening and closing a fitting.

[0002]

2. Description of the Related Art An automatic door apparatus of a hanging type is disclosed in
It is disclosed in JP-A-232542 and JP-A-10-243626. In each case, a linear motor is used as a door engine, and a hanger roller for suspending the door is engaged with a hanger rail to support the door so that the door can run freely. In either case, it is necessary to fix the appearance of the automatic door by attaching a blind cover that covers the hanger rail.

[0003]

Therefore, maintenance of the automatic door device requires removal of the blind cover, which is troublesome. Further, the automatic door device requires a large installation space above the suspended door. Further, it is not easy to maintain the roller, which is a movable part and the weight of the door is high and the frequency of replacement is high. The present invention has been made in order to solve the above-described problems, and an object of the present invention is to provide a small-size automatic fitting opening / closing apparatus that can be installed in a ditch of a Kamoi gate and has excellent workability and maintainability. .

[0004]

According to a first aspect of the present invention, there is provided an automatic opening and closing apparatus for a fitting, wherein the stator for the movable coil type linear motor is provided at an upper end of the fitting which is movable along a groove of the gate. And an automatic opening / closing device for a fixture in which a mover relatively movable with respect to the stator is fixed in a groove of the Kamoi, and a rail member formed in three vertical steps in the groove of the Kamoi. Arranged, the stator is separated from the fitting in the middle of the rail member and slidably arranged,
The mover is accommodated and fixed in the upper stage of the rail member, and a hanger with a roller which is detachable from the fitting is movably arranged in the lower stage of the rail member, and a joint is provided between the hanger and the stator. Characterized by being connected via

[0005] In order to achieve the above object, a second aspect is provided.
The fixture automatic opening and closing device according to the above, disposes the stator of the coil movable linear motor at the upper end of the fixture that can move along the groove of the Kamoi, and the movable element that can move relative to the stator. An automatic opening / closing device for a fitting fixed to a groove of a Kamoi, wherein a rail member formed in three stages, upper and lower, is disposed in the groove of the Kamoi, and the stator is separated from the fitting in a middle stage of the rail member. In addition to being slidably disposed, the mover is accommodated and fixed in the upper stage of the rail member, and a pair of left and right hanger with rollers detachably mounted on the fitting is movably disposed in the lower stage of the rail member. , And the stator further comprises:
A projecting ridge protruding downward from the rail member is provided in the lower surface longitudinal direction, and the hanger is attached to the fitting by sandwiching the projecting ridge with the hanger from both sides in the longitudinal direction, and the hanger and the stator are connected and integrated. It is characterized by having done.

According to a third aspect of the present invention, there is provided an automatic opening and closing apparatus for a fitting, wherein a stator of a coil movable linear motor is provided at an upper end of a fitting movable along a groove of a gate. What is claimed is: 1. An automatic opening / closing device for a fixture, comprising a movable member fixed to a groove of a Kamoi gate, the movable member being relatively movable with respect to the stator, wherein a rail member formed in two upper and lower stages is disposed in the groove portion of the Kamoi gate. The stator is separated from the fittings so as to be slidable at the upper stage of the member, and the movable element is accommodated and fixed above the stator. The hanger with a roller is disposed so as to be able to travel, and further, the movable element maintains a constant distance between the movable element and the stator that is attracted to the movable element side by a magnetic attractive force acting between the movable element and the stator. Provide spacing rollers,
On the other hand, the stator is provided with a ridge protruding downward from the rail member in the longitudinal direction of the lower surface thereof, and by attaching the hanger to a fitting, the ridge is sandwiched by hangers from both longitudinal sides. The hanger and the stator are connected and integrated.

According to a fourth aspect of the present invention, there is provided an automatic opening and closing apparatus for a fitting, wherein a stator of a coil movable linear motor is disposed at an upper end of a fitting movable along a groove of a gate. An automatic opening / closing device for a fixture, comprising a movable member that is movable relative to the stator and fixed in a groove of the Kamoi, wherein a rail member formed in upper and lower two stages is disposed in the groove of the Kamoi. The stator is separated from the fitting and slidably disposed on the upper part of the rail member, and the movable element is accommodated and fixed above it, and the lower part of the rail member is detachable from the fitting. A pair of left and right hanger with rollers is provided so as to be able to run, and furthermore, the stator is provided with engaging portions that can be disengaged from the hanger at both ends in the lower surface longitudinal direction, and the hanger is fixed to the engaging portion. By engaging from both ends of the child Wherein the stator to the consolidation integrated with.

[0008]

The automatic opening / closing device for a fitting according to the first aspect of the present invention is such that the main components are integrated into the rail member and integrated, so that the attachment and detachment at the time of maintenance are easier than under the Kamoi. Adjustment work on site is unnecessary. Also, since the fittings need only be attached to the hanger, they can be easily attached and detached.

The automatic opening and closing device for a fitting according to the second to fourth aspects has the same operation and effect as the automatic opening and closing apparatus for a fitting according to the first aspect, and also has the following specific operation and effect. In other words, the automatic opening and closing device for a fitting according to claim 2 is a connection between a stator slidably disposed in the middle of the rail member and a pair of left and right hanger with rollers slidably disposed in the lower stage of the rail member. This is performed by sandwiching the ridges provided in the longitudinal direction of the lower surface of the stator from both sides in the longitudinal direction with a pair of right and left hanger with rollers attached to the fitting. Therefore, the hanger with the roller can be replaced without removing the stator from the rail member, which facilitates the replacement operation and improves the maintainability.

The automatic opening and closing device for a fitting according to claim 3 is
The stator is attracted to the mover by the magnetic attraction force acting between the mover and the stator, and the distance between the stator and the mover accommodated in the upper stage of the rail member by the spacing roller provided on the mover. Is kept constant. Therefore, the frictional resistance between the rail member and the stator when the fitting is opened and closed can be reduced. Also,
Since the stator and the hanger with the roller are a pair of hanger with the roller attached to the fitting, the ridge provided in the longitudinal direction of the lower surface of the stator is connected by sandwiching from both sides in the longitudinal direction. The replacement can be performed without pulling out the stator from the rail member, thereby improving maintainability.

[0011] The automatic opening and closing device for a fitting according to claim 4 is
The connection between the stator and the hanger with the roller is performed by engaging the hanger with the roller from both ends of the stator with the engagement portions provided at both ends in the longitudinal direction of the lower surface of the stator. Therefore, connection and disconnection of the stator and the hanger with the roller can be easily performed in the rail member, and the work of replacing the hanger with the roller becomes easy. In addition, since the stator is supported by the hanger with the roller in a state where the hanger with the roller is connected to the stator, the stator can be kept out of contact with the rail member and the mover, and the operation of the linear motor becomes smooth. .

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS (First Embodiment) A first embodiment of the present invention will be described with reference to the accompanying drawings. According to the present invention, a stator of a coil movable linear motor is disposed at an upper end of a fitting that can move along a groove of a Kamoi, and a movable element relatively movable with respect to the stator is provided in a groove of the Kamoi. Automatic opening / closing device for fixed fixtures (JP-A-2000-5472)
7). 1 is a perspective view of the rail member 1, FIG. 2 is an exploded perspective view of the mover unit 11, FIG. 3 is a front view of an assembled state, FIG. 4 is a cross-sectional view taken along the line AA in FIG. It is sectional drawing of a part. The rail member 1 is an extruded and integrally formed product of aluminum and has a substantially inverted U-shaped cross-section, and is provided with support projections 4, 4 and sliding shelves 5 from opposite walls 3, 3 on both sides of the ceiling wall 2. 5 are integrally formed toward the inside. At the lower ends of the opposing walls 3, 3, hanger rails 6, 6 that are bent inward, respectively, are formed.

The inner space of the rail member 1 is divided into an upper section 1a, a middle section 1b, and a supporting section 4 and 4 and shelves 5 and 5.
The lower section 1c is divided into three upper and lower sections. At a substantially central portion in the longitudinal direction of the upper portion 1a, a fitting portion 7 for fitting a mover unit 11 to be described later by notching a part of the ceiling wall 2 and one of the opposing walls 3 is formed. I have. A screw hole 8 for fixing the mover unit 11 is formed in the opposing wall 3 in a portion where the fitting portion 7 is located. Further, a screw hole 9 for fixing the rail member 1 in the groove 52 of the gate 51 is formed in the ceiling wall 2. The rail member 1 is cut in accordance with the length of the gate 51 on which the fitting 41 is fitted and slides so that the position of the fitting portion 7 is at the center in the longitudinal direction.

As shown in FIG. 2, in a mover unit 11 of a coil movable linear motor, a plurality of coils 13 each containing an iron core are arranged in tandem on a mounting plate 12 also serving as a yoke, and a magnetic sensor 14 is disposed at the center thereof. The mounting plate 12 is fixed in a case 15 by a fastening screw 16. The lower ends of the coil 13 and the magnetic sensor 14 are located in openings (not shown) provided on the bottom surface of the case 15. Further, a circuit board 17 for supplying power to each coil 13 and a controller 18 are mounted in the case 15. Then, the power cord 19 is connected to the controller 18, and the upper opening is closed by the upper lid 20. This case 15
Are fixed to the fitting portion 7 of the rail member 1 and supported by the support protrusions 4 and 4 and are fixed to the opposing wall 3 of the rail member 1 by fastening screws (not shown).

In the middle part 1b of the rail member 1, a stator 21 of a coil movable linear motor is separated from a fitting 41 and slidably mounted on the shelves 5,5. Stator 2
Reference numeral 1 denotes an iron yoke which is formed to have substantially the same length as the width of the fitting 41, and in which a plurality of permanent magnets 22 magnetized in the thickness direction have different polarities between adjacent magnets.
3 and are housed in a resin case 24 having a small frictional resistance. Case 24
Has an opening on the upper surface facing the coil 13 and the magnetic sensor 14 of the mover unit 11;
A ridge 25 for reinforcement is integrally formed in the longitudinal direction of the lower surface. Both ends of the ridge 25 are cut out, and are shorter than the entire length of the case 24. A joint 26 is attached to one end of the ridge 25. The joint 26 is formed by bending a fitting portion 27 and a fitting portion 28 fitted into a traveling body 33 of a hanger 31 described later.
The fitting portion 28 is covered with a cushion rubber 29.

The hanger 31 is provided with rollers 32 which are supported on the hanger rails 6 and 6 of the rail member 1 so as to be able to move freely, at four positions in front, rear, left and right. And a hanger body 35 suspended from a suspension shaft 34 projecting downward from the lower surface of the traveling body 33 through the hanger rails 6. The hanger 31 is such that the fitting portion 28 of the joint 26 is
3 to be connected to the stator 21.

The rail member 1 incorporating the mover unit 11, the stator 21 and the hanger 31 as described above is disposed in the groove 52 of the gate 51 so that the position of the mover unit 11 is at the center in the longitudinal direction. Is done. And the hanger body 3
The fitting 5 is fitted into a fitting portion 42 formed at the upper end of the frame of the fitting 41, and is fastened by a fixing screw 43 to suspend the fitting 41 in the groove 52 of the gate 51.

The automatic opening / closing device for the fitting is operated by operating an opening / closing switch (not shown) or slightly moving the fitting 41 in the opening direction (assist function), so that the controller 17 allows the coil 13 and the permanent magnet 22 detected by the magnetic sensor 14 to be detected. Based on the relative position with respect to the direction, the energizing direction to each coil 13 of the mover unit 11 is switched with good timing. As a result, the polarity of the permanent magnet 22 is attracted to the iron core of each coil 13.
A repulsion polarity is generated, and a thrust in a predetermined direction is applied to the movable unit 1
1 and the stator 21 so that the stator 21 is
It slides inside and pulls the fitting 41 to automatically open and close.

As described above, the apparatus for automatically opening and closing a fitting according to the first embodiment includes a movable member unit 11 in a rail member 1.
The main components such as the controller 18, the stator 21 and the hanger 31 are incorporated and integrated, so that attachment and removal during maintenance can be easily performed from below the Kamoi 51, and adjustment work on site can be performed. It becomes unnecessary. Since the fittings 41 need only be attached to the hanger body 35, they can be easily attached and detached. Further, since the rail member 1 is integrally formed by extrusion molding, it can be manufactured at low cost and the handling becomes convenient.

The stator 21 covers both sides and the lower surface of the permanent magnet 22 and the yoke 23, which are in contact with the middle portion 1b of the rail member 1, except for the upper surface, with a resin case 24 having a small frictional resistance. The sliding resistance of the stator 21 sliding in the portion 1b is reduced, and the fitting 41 can be opened and closed smoothly. Further, since the controller 18 is incorporated in the mover unit 11 fitted to the fitting portion 7 of the rail member 1, attachment and detachment at the work site becomes easier.

FIG. 6 shows a modification of the first embodiment. As shown in FIG. 6, the traveling bodies 33 of the pair of hangers 31 on the left and right sides are respectively formed with holding portions 33 a. When the right and left hangers 31 are fitted to the fitting portions 42 of the fittings 41, the holding portions 33a of the hangers 31 abut against both ends of the ridge 25 integrally formed on the lower surface of the case 24 of the stator 21. The ridge 25 is sandwiched from both left and right sides. For this reason, the protrusion 25 has a length that matches the interval between the left and right hangers 31. In addition, cushion rubbers 29 for preventing backlash are attached to both left and right sides of the ridge 25.

The above-mentioned automatic opening / closing device for fittings includes a fitting 41.
The hanger main bodies 35 of the left and right hangers 31 in which the rollers 32 are supported by the hanger rails 6, 6 of the rail member 1 so as to be able to travel freely are fitted into the fitting portions 42 of the fittings 41, respectively. Then, it is fastened by the fixing screw 41. Accordingly, the fitting 41 is hung in the groove 52 of the gate 51, and the holding portion 33a of the traveling body 33 sandwiches the ridge 25 of the stator 21 from both left and right sides, and the stator 21 and the hanger 31 are connected. Is done.

Therefore, the hanger 31 is replaced with the stator 21.
Can be carried out simply by removing the hanger 31 from the fitting portion 42 of the fitting 41 without pulling the hanger 31 out of the rail member 1, thereby improving maintainability.

(Second Embodiment) FIGS. 7 and 8 show an automatic opening / closing device for a fitting according to a second embodiment. The basic configuration of the second embodiment conforms to the basic configuration of the first embodiment. Therefore, the same components are denoted by the same reference numerals as in the first embodiment, and detailed description is omitted. The rail member 1A is an extruded and integrally formed product of aluminum, has a substantially inverted U-shaped cross section, and has opposing walls 3 on both sides of the ceiling wall 2.
The ledges 3 and 5 are integrally formed inward from 3, and hanger rails 6 and 6 are formed at the lower ends of the opposing walls 3 and 3, respectively, and are bent inward. The inner space of the rail member 1A is divided into the upper section 1a by the shelves 5 and 5.
And a lower stage 1c. At substantially the center in the longitudinal direction of the rail member 1A, the mover unit 11 described in the first embodiment is attached to the ceiling wall 2 of the upper section 1a by a bracket 61.

As shown in FIG. 8, rollers 62 for maintaining a gap are attached to both sides of the mover unit 11 at the center in the longitudinal direction. Roller 62 for maintaining spacing
Is provided within the upper section 1a of the rail member 1A.
The stator unit 11 is rotated by contacting the upper surface of the aluminum case 24 of the stator 21 inserted and arranged facing the movable unit 1.
The distance between the stator 21 and the stator 21 attracted toward the mover unit 11 by a magnetic attraction force acting between the stator 21 and the stator 21 is kept constant.

On the lower surface of the case 24 of the stator 21, a ridge 25 projecting from the lower step 1c of the rail member 1A is integrally formed in the longitudinal direction. The protruding ridge 25 is notched at both ends in the longitudinal direction, and when the left and right hangers 31 are fitted to the fitting portions 42 of the fitting 41, the holding portions 33 a of the hangers 31 abut against both ends of the protruding ridge 25. The projection 25 is sandwiched from both left and right sides. For this reason, the ridge 25
Has a length that matches the interval between the left and right hangers 31. Further, cushion rubbers 36 for preventing backlash are attached to both left and right sides of the ridge 25.

The above-mentioned automatic opening / closing device for fittings comprises the first
Similar to the modification of the embodiment, the fitting 41 is inserted into the groove 52 of the Kamoi 51.
The hanger main bodies 35 of the left and right hangers 31 in which the rollers 32 are movably supported by the hanger rails 6 and 6 of the rail member 1 </ b> A are respectively fitted into fitting portions 42 of fittings 41 and fixed screws 43. Fasten. Thereby, the fitting 4
1 is hung in the groove 52 of the gate 51, the holding portion 33a of the traveling body 33 sandwiches the ridge 25 of the stator 21 from both left and right sides, and the stator 21 and the hanger 31 are connected. The space between the mover unit 11 and the stator 21 is maintained at a constant interval by the interval maintaining roller 62, so that the friction when the fitting 41 is opened and closed can be reduced. Further, the hanger 31 can be replaced simply by removing the hanger body 35 from the fitting portion 42 of the fitting 41, and the stator 21 is connected to the rail member 1A.
Since there is no need to remove the battery, the replacement work is simplified and the maintainability is improved.

(Third Embodiment) FIGS. 9 to 11 show an automatic opening / closing apparatus for a fitting according to a third embodiment. The basic configuration of the third embodiment conforms to the basic configurations of the first and second embodiments. Therefore, the same components have the first
The same reference numerals as those in the second embodiment denote the same parts, and a detailed description thereof will be omitted. Rail member 1A facing mover unit 11
On the lower surface of the aluminum case 24 of the stator 21 disposed in the upper step 1a, a ridge 25 projecting from the lower step 1c of the rail member 1A is integrally formed in the longitudinal direction. The engaging member 71 is fastened to the notch.

As shown in FIG. 11, the engaging member 71 has a width dimension that can be inserted into and removed from a traveling body 78 of a hanger 77, which will be described later, and a contact portion 72 that contacts the end surface of the ridge 25 is bent at a right angle. Have been. The fastening portion 73, the engagement portion 74, and the engagement guide portion 75 are sequentially formed to bend following the contact portion 72. A cushion rubber 76 is attached to the contact portion 72. The traveling body 78 of the hanger 77 has a substantially U-shaped cross section, has rollers 79 mounted on both sides, and has a suspension shaft 34 for suspending the hanger body 35 protruding from the lower surface. The upper end of the traveling body 78 having a substantially U-shaped cross section is formed with a flange portion 80 which is bent inward and is opposed to each other.

The connection between the stator 21 and the hanger 77 is performed by a traveling body 78 supported by the hanger rail 6 of the rail member 1A.
Is moved in the traveling direction, and the flange portion 80 of the traveling body 78 is moved.
Between the engaging portion 74 of the engaging member 71 and the lower surface of the case 24.
This is done by inserting and engaging. At this time, the traveling body 78 of the hanger 77 comes into contact with the cushion rubber 76 attached to the contact portion 72 of the engaging member 71 and is positioned. In addition, by connecting the stator 21 and the hanger 77 as described above, the stator 21 is held by the hanger 77, and the vertical movement is restricted. As a result, the stator 21 and the mover unit 11 are held at a constant interval.

The above-mentioned automatic opening / closing device for fittings comprises a stator 2
A flange portion 80 formed on the traveling body 78 of the hanger 77 is connected between the engaging member 71 fastened to both longitudinal ends of the lower surface of the stator 21 and the lower surface of the rail member 1A.
Is inserted and engaged from both ends of the stator 21. The connection and disconnection of the stator 21 and the hanger 77 can be easily performed simply by moving the hanger 77 in the traveling direction. In addition, as shown in FIG.
0 may be provided on the hanger 77 side, and an engagement hole 91 with which the engagement piece 90 can be disengaged may be provided on the stator 21 side.

[Brief description of the drawings]

FIG. 1 is a perspective view of a rail member according to a first embodiment.

FIG. 2 is an exploded perspective view of the mover unit.

FIG. 3 is a front view of the same assembled state.

FIG. 4 is a sectional view taken along line AA in FIG.

FIG. 5 is a cross-sectional view of a main part of the automatic fixture opening and closing device according to the first embodiment.

FIG. 6 is a cross-sectional view of a main part corresponding to FIG. 5 and showing a modification of the first embodiment.

FIG. 7 is a view showing an automatic opening / closing device for a fitting according to a second embodiment;
3 is a sectional view of a main part corresponding to FIG.

FIG. 8 is a sectional view of a main part corresponding to FIG. 5;

FIG. 9 is a view showing an automatic opening / closing device for a fitting according to a third embodiment;
3 is a sectional view of a main part corresponding to FIG.

FIG. 10 is a sectional view of a main part corresponding to FIG. 5;

FIG. 11 is a perspective view of an engagement member and a hanger.

FIG. 12 is an explanatory diagram showing another connection mode of the stator and the hanger.

[Description of Signs] 1 ... Rail member 1a ... Upper section 1b ... Middle section 1c ... Lower section 6,6 ... Hanger rail 7 ... Fitting section 11 ... Motor unit 18 ... Controller 21 ... Stator 24 ... Case 25 ... Ridge 26 ... Joint 31, 77 ... Hanger 32, 79 ... Roller 33, 78 ... Running body 33a ... Nipping part 35 ... Hanger body 41 ... Fitting 51 ... Kamoi 52 ... Groove 62 ... Roller for maintaining spacing 71 ... Engaging member 74 ... Engaging part 80 ... Flange

Claims (4)

[Claims] 1. A stator of a movable coil type linear motor is provided at an upper end of a fitting movable along a groove of a Kamoi, and a movable element relatively movable with respect to the stator is fixed to a groove of the Kamoi. An automatic opening / closing device for a fitting, comprising: a rail member formed in a three-tiered manner in a groove of a Kamoi gate; and the stator is separated from the fitting and slidably disposed in a middle part of the rail member. At the same time, the mover is accommodated and fixed in the upper stage of the rail member, and a hanger with a roller which is detachable with respect to the fitting is movably disposed in the lower stage of the rail member,
An automatic opening / closing device for a fitting, wherein the hanger and the stator are connected via a joint. 2. A coil movable linear motor stator is disposed at an upper end of a fitting movable along a groove of the Kamoi, and a movable element relatively movable with respect to the stator is fixed to the groove of the Kamoi. An automatic opening / closing device for a fitting, comprising: a rail member formed in a three-tiered manner in a groove of a Kamoi gate; and the stator is separated from the fitting and slidably disposed in a middle part of the rail member. At the same time, the mover is accommodated and fixed at the upper stage of the rail member, and a pair of left and right roller hangers detachably mounted on the fitting is movably disposed at the lower stage of the rail member. The child is provided with a ridge projecting downward from the lower side of the rail member in the longitudinal direction of the lower surface, and by attaching the hanger to a fitting, the ridge is sandwiched between hangers from both sides in the longitudinal direction, and the hanger and the stator are provided. And integrated Automatic opening and closing device for fittings. 3. A coil movable linear motor stator is provided at an upper end of a fitting movable along a groove of the Kamoi, and a movable element relatively movable with respect to the stator is fixed to the groove of the Kamoi. An automatic opening / closing device for a fitting, comprising: a rail member formed in two upper and lower stages in a groove of a Kamoi gate; and the stator is separated from the fitting and slidably disposed on the upper stage of the rail member. At the same time, the mover is accommodated and fixed thereabove, and a pair of left and right roller hangers detachably mounted on a fitting is provided at the lower part of the rail member so as to be able to travel. Is provided with an interval maintaining roller for maintaining a constant interval between the stator and the stator attracted to the mover side by a magnetic attraction force acting between the stator and the stator, while the stator has a lower surface longitudinal direction. A ridge is provided at the bottom of the rail An automatic opening / closing apparatus for fittings, wherein the hanger is attached to a fitting so that the ridges are sandwiched between the hangers from both sides in the longitudinal direction, and the hanger and the stator are integrally connected. 4. A stator of a movable coil type linear motor is provided at an upper end of a fitting movable along a groove of the Kamoi, and a movable element relatively movable with respect to the stator is fixed to a groove of the Kamoi. An automatic opening / closing device for a fitting, comprising: a rail member formed in two upper and lower stages in a groove of a Kamoi gate; and the stator is separated from the fitting and slidably disposed on the upper stage of the rail member. At the same time, the mover is accommodated and fixed thereabove, and a pair of left and right roller hangers that are detachable from a fitting are movably disposed below the rail member. Is provided with engaging portions that can be disengaged from the hanger at both ends in the longitudinal direction of the lower surface, and the hanger and the stator are integrally connected by engaging the hanger with the engaging portions from both ends of the stator. An automatic opening and closing device for fittings.